Carbureter.



PATENTEDJULY 7, 1908.

E. N. BRODERIGK.

CARBURETER.

APPLICATION FILED MAY 22. 1907.

3 SHEETS-SHEET 1 LNVENTOR at magi m female-AK;

WITNEEiSES:

No. 892,499. Q PATENTED JULY '7, 1908. E. N. BRODERIGK.

CARBURBTER.

APPLIOATION FILED MAY 22,1907.

3 SHEETSSHEET 2' WITNESSES;

No. 892,499. PATENTED JULY '7, 1908.

E. N. BRODERICK. GARBURETBR.

APPLIOATION FILED MAY 22. 1907';

3 SHEETS-SHEET 3.

R59. FW'X as I as INVENTOR WITNESSES:

ERNEST N. BRODERIOK, OF DETROIT, MICHIGAN.

GARIBURETER.

Specification of Letters Patent.

Patented July '7, 1908 Application filed May 22, 1907. Serial No. 375,030.

To alt whom it may concern:

Be it known that I, ERNEST N. BRODERICK, a citizen of the United States of America, re-

siding at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Carbureters, of

which the following is a specification, refertail of a valve stem lock washer.

I side wall 2; an

once being had therein to the accompanying drawings.

This invention relates to carbureters for internal combustion engines, and especially to certain features of construction whereby certainty of initial action, and ease and exactness of control are obtained together with simplicity and readiness of adjustment.

The invention consists in the matters hereinafter set forth, and more particularly pointed out in the ap ended claims.

Referring to the (rawings, Figure 1 is a view in longitudinal section through a carbureter which embodies features of theinvention, taken in the axial plane of the engine or outlet port. Fig. 2 is a section on .line ac:1: of Fig. 1. Fig. 3 is a view in vertical section taken on line y-au of Fig. 2. Fig. 4 is a perspective view in detail of the throttle valves. Fig. 5 is a detail of a modified form of float and valve .lever connection. Fig. 6 is a de- Fig. 7 is a diagram illustrating position of a single valve closure covering two inlet ports, the straight line indicating the closure arm and the arrows the inlets and outlets. Fig. 8 is a similar diagram showing both inlets open.

Fig. 9 is a diagram showing the upper inlet open and the lower closed. Fig. 10 is a diagram showing-the upper inlet closed and lower inlet open.

In the drawings, the base of the carbureter is a vertically disposed plane metal cylinder, Whose bottom 1 is preferably integral with its axial, hollow conical core 3, likewise preferably integral with the bottom, extends up through the cylinder and the annular space between the core and side wall comprises a float chamber. A pair of radial lu s 4 and 5 are formed on the wall of the cylinder in vertical alinement. The lower lug 4 is hollow, communicating with the interior of the cylinder, and a nipple 6 depending therefrom is exteriorly screw-threaded or otherwise suitably fitted for a fuel pipe connection. The nipple is counterbored and screw-threaded to receive a screw-plug 7, that extends quite through the bottom of the lug. The latter is preferably slightly raised above the float chamber bottom to prevent sediment from settling thereon. The screw plug isaxially apertured and counter-bored at its u per end as a valve seat for a conical, need e-valve closure 8, which is secured on a vertical, longitudinally reciprocable stem 9. The latter extends through an aperture in the upper side of the lug 4 and a bushing 10,

screw-threaded or otherwise secured in the upper lug 5. The stem is squared where it passes through the bushing, for a square adj usting nut 1 1 which is held ina corresponding guide aperture 12 in a lock washer 13,

that is seated in the upper recessed face of the bushing, a notch 14 in the washer margin engaging a pin or lug in the bushing recess, or other convenient means being used to )10- vent inter-rotation of the parts. The 1101 ow shield 15 of suitable design is set or screwed on the upper end of the bushing 10, to guard the stem.

The adjacent faces of the lug 4 and bushing 10 are counterbored to hold a gage glass 16, gaskets being interposed between the ends of the glass and the metal to make tight connection, and suitable index marks being placed on the glass, so that it acts as a sight I gage for the float chamber, while it houses the needlevalve stem and permits view of the latter so that its action can be readily observed.

An annular hollow metal float 17 in the float chamber is operatively connec d to the needle-valve stem 9 by a lever 18, ielcrumed on a pivot pin 19 in the cylinder wall. The outer end of this lever is bifurcated, and in the preferred form of construction its extremities are vertically slotted for receiving pintles 20 at diametrically opposite points in a gimbal ring 21, which encircles the 'lloat, and in turn is pivoted thereto by pins 22 on the float in a diameter at right angles to the pintlc diameter, the whole being in ellect the usual gimbal connect ms used for a compass or the like. Or the upright arms of the lever may have slotted engagement with diametrically opposite pins 23 on the lloat without the intervention of the ring. The other end of the lever 18 is forked to embrace a collar A cylindrical closed casin 26 sets over the upper end of the float cham er, a tight joint being formed by a flange 27 engaging the cover margin and cylinder wall; and an outlet port 28, preferably circular, through which the contents of the carburetor is drawn by the engine piston, is formed in the casing Wall diametrically opposite the sight gage lass of the float chamber, the casing walls eing carried out as a hollow nipple fitted for the usual engine connections.- Round air inlet ducts 29 and 30 are similarly formed '7 flat plate 31 at the base of the chamber, pro- .vided with a central aperture 32 somewhat .larger than the top of the float chamber core 3. Outwardly concave wings 33 extend upwardly. from the apertured margin of the plate with which they are preferably integral, and are so arranged and disposed as to cover the diametrically opposite air inlets 29 and 30, and to deflect the incoming currents down and around the chamber. A bridge 34 connects the top margins of the wings; the deflector is secured by screws or the like to the casing?.

An upright stem 36 is supported by a hor'i zontalv cross-arm 37 in the core 3, the parts being preferably formed integrally with the core. A horizontal duct 38 extends quite through the lower cross-arm opening at each end into the float chamber, preferably above the chamber bottom, and connects with a vertical central duct 39 in the upright stem '36, the conical wall of the core and the apertured stem forming in effect an atomizing valve which discharges upward through the base of the vaporizer chamber. At the mouth of theduct 39, a conical valve seat is formed on which a verticallyreciprocable, conical closure 40 is ada ted to set. A ver.- ticalstem 41 carries t e closure and has screw-threaded engagement with an aperture in the deflector bridge 34, its upper end passing through thecasing,.being adjusted y a hand wheel 42. In the preferred form of construction, a conical gauze or perforate shield 43 over the vaporizing valve assists in diffusing the spray.

An auxiliary capillary diict 44 is formed in the core stem 36,, its upper end opening into a cup-shaped mouthv 45'close to the main duct valve seat and at about theupper level tents. Its lower end to, be maintained in the float chamber conopens horizontally into the float chamber. The outlet port may be closed. by a throteeaaee casing through which it extends. ment of the valve is of sufflcient extent to completely close the outlet.

T e air inlet ports 29 and 30 are controlled by a single valve, which comprises a cylin- The segdrical segment "concentric with and bear ing against the inner face of the casing wall.

which extends around the major portion .of the casing Wall,so that it may be made to close both the air inlet ports simultaneously.

An aperture 51 in the segment, of the same size-as one of the air inlet ports 29 is located so that when the opposite inlet 30 is just uncovered by the segment, the other inlet 29 registers with the segment aperture. Thus both ports may be opened and closed inde pendently or simultaneously.

An inwardly extending arm 52 preferably integral with. the segment 50, is provided with a boss 53 whose axis is coincident with the casing cylinder, and is j ournaled in the boss 48 of the outlet valve arm, and in turn, forms a bearingfor the'upper portion of the rotatable valve'stem 41.

The throttle, air inlet and atomizing valve closure are operated by a single throttle lever 54, which is counterbored at its inner end to receive both the inner inlet valve boss .53 and the outer mixture outlet valve boss 48. A set screw 55 adjustably secures the boss 53 to the throttle lever boss, and another set screw 56 sets up the split lever hub so that it grips the other boss 48. A split collar 57 on the stem 41 above the bosses, is clamped in place by a screw, 58, and interlocked with the throttle lever by the pin 59.

- Thus the necessary angular relations and other adjustment) in position between the various closures are obtained so that the lever operates them' properly. Outer lugs 60 are suitably disposed on the chamber casings for bolting or otherwise securing them together.

. As a further detail of construction, a drain is provided for the floatchamber, which consists of a depending nipple 61 on the chamber bottom interiorly screw-threaded to receive a screw-plug 62 which normally closes an oblique duct 63 in the nipple wall.

' The operation of the carbureter is automatic, after the float chamber is once filled. Thereafter, if the engine which it supplies is stopped, for any length of time, or if the level in the float tank falls an appreciable distance below theneedle valve seat, the auxiliary duct holds a dro of liquid in its cup close to the nozzle mout h, so as to supply a sufficient amount to insure initial action.

By arranging the inlet valve to close before the outlet is closed, the carbureter may operate with the limited amount of air through the vaporizerand the :fuel coming through the auxiliary duct.

The gage glass serves a double purpose as housing for the fuel valve stem and as gage for the float tank, thus to instantly detect any lodgment from impurities in the pipes or "failure of fuel supply? The shield perfectly guards the stem, and its ready removal allows quick adjustment of the valve.

The distribution of the air inlet ports and deflector prevents any dead spaces in the chamber, so that there is a uniform mixture, and the hot air duct also allows the introduction of a heated mixture to the engine cylinder The one lever control gives simplicity of action and the valves controlled by it are readily adjusted to obtain the proper interin the vaporizing action. The valve bearing urtaces are large and so resist wear, but when loose, may be easily refitted or replaced.

The design and construction may be varied without departing from the spirit of the invention and I. do not care to limit myself to any particular form and arrangement of arts.

W hat I claim as my invention is 1. A carbureter comprising a float chamber, a vaporizing chamber over the float chamber, an atomizing valve discharging from the float chamber into the vaporizing chamber, opposite air inlet ports in the vaporizing chamber, a valve closure within-the vaporizing chamber, adapted to close said ports either independently or simultaneously, deflecting means opposing the air ports, an outlet port in the vaporizing chamher, a closure to r the port within the chamber, and a throttle lever controlling the atomizing valve and inlet and outlet closures.

2. A carburetor comprising a float cham her, a cylindrical vaporizing chamber over the float chamber, an atomizing valve discharging from the float" chamber into the vaporizing chamber, opposite air inlet ports chamber, a cylindrical segmental closure within the vaporizing chamher, adapted to close said ports either independently or simultaneously, deflecting means opposing the air ports, an outlet port in the vaporizing chamber, a cylindrical segmental closure for the port within the chamber, and a throttle lever controlling the atomizing valve and inlet and outlet closures.

3. A carburetor comprising a float ch'a'm ber, a vaporizing chamber over the float chamber, an atomizing valve discharging from the float chamber into the vaporizing chamber, opposite air inlet ports in the vaporizing chamber, a valve closure within the vaporizing chamber, adapted to close said enabling the operator the cover, provided I drical segmenta valves and vaporizing ports either independently or simultaneously, deflecting means consisting of a centrally apertured disk provided with outwardly concave wings opposing the air ports, an outlet port in the vaporizing chamber, a closure for the port within the chamber, and a throttle lever controlling the atomizing valve and inlet and outlet closures.

4. A carburcter comprising a float chamber, a vaporizing chamber over the float :hamber, an atomizing valve discharging from the float chamber into thevaporizing chamber, opposite air inlet ports in the vaporizing chamber, a valve closure within the vaporizing chamber, adapted to close said ports either independently or simultaneously, deflecting means consisting of an annular, dished cover'over the float chamber and a centrally apcrtured disk secured over the cover,provided with. outwardly concave wings opposing both airinlcts, an outlet port in the vaporizing chamber, and a throttle lever controlling the atomizing valve and inlet and outlet closures.

5. A carbureter comprising afloat chamber, a vaporizing chamber over thefloat chamber, an atomizing valve discharging from the float chamber into the vaporizing chamber, opposite air inlet ports in the vaporizing chamber, a valve closure within the vaporizing chamber, adapted to close said orts either independently or simultane- -ously, deflecting means consisting of an an nular, dished cover over the float chamber and a centrally apertured disk secured over with outwardly concave wings opposing both air inlets and a. gauze cone hood over the disk aperture, an outlet port in the vaporizing chamber, a closure for the port within the chamber, and a throttle lever controlling the atomizing'valve and in let and outlet closures.

6. A carbureter comprising a float chamber, a cylindrical vaporizing chamber over the float chamber, an outlet port on the wall of the va orizing chamber, a cylinclosure for the port baring a ainst the inner face of the atomizing cham er wall, provided with a radial arm, whose inner end is journaled concentrically in and extends above the top of the chamber casin a pair of diametrically oppo with thedefieotor bridge, concentrically journaled in and extending-beyond the inner end of the air inlet port closure and a throttle lever adjustably secured to hearing ends of the outlet and inlet closure arms, and to the said stem.

carburem; comprising an annular,

float chamber, a vaporizing chamber above the float chamber in axial alinement therewith, an upright axial stemintegrally se- "cured by cross-arms in the a erture of. the

annular chamber, a horizonta feed duct eX- tending through one of the cross-arms and opening into each side of the float chamber at an interval above the bottom, a vertical feed duct extending from the cross duct to an uaperturedvalve seat at the upper end of the stem, a'closure for the seat, an auxiliary duct of small bore from the float chamber opening near the upper end of the stem, a fuel valve for the float chamber, inlet and outlet valves-in the vaporizing chamber, and means for operating said inlet and outlet valves and i closure.

float-chamber, having a central inner Walha cylindrical vaporizing chamber over: the

float chamber, an atomizing valve whose casing-- comprises the; conical, 'lnnerwall of the float chamber and an apertured stem S. A carbureter comprising an. annular A -'ee2,eee

secured by?" an apertured cross-arm axially within said inner wall, anda closure, adapted to be seated on the apertured end of the stem, secured on the upper end of a rod ex tending upward through the vaporizin .cham' ber, an auxiliary feed duct extending through a cross arm and longitudinally through the stem, provided Withjamouth near the upper end of the stem at the normal level of the float chamber oontents,'a'nd air and fuel supply and throttling means.

anda vaporizing chamber, an atomizing valve afuel fee d duct concentric therein, and means adaptedto maintaimm small quantity of fuel liquid near the inspiratingmouth in- "dependently of fluctuations in the level in the floatchambe r contents, consisting of a capillary duct leading from the float chamber provided with a small, liqiud retaining outlet at substantially thelevel of the float 01111111 near'the outlet ofthe main uct. In testimony whereof I afiix my signature in presence of two witnesses; 4

- ERNEST N. BRODERHPK; .Witnesses: i

(3. R. STIGKNEY,

ANNA-M. Dom

ber contents, within theins irating mouth In a carbureter having a float chamber having an annular inspirating mouth and 

